Rare earth-doped, stabilized cadmium halide glasses

US5346865A · kind A · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Bruce Gardiner Aitken · Corning, US
• Frank A. Annunziata · Horseheads, US
• Roger F. Bartholomew · Corning, US
• Mark A. Newhouse · Corning, US
• Mark L. Powley · Corning, US
• Andrea L. Sadd · Corning, US

Key dates

• Filing date: Jul 6, 1993
• Grant date: Sep 13, 1994
• Expiry date: Jul 6, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S501/904
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

This invention is directed to the production of transparent glasses exhibiting transmission far into the infrared regime of the radiation spectrum. The glasses consist essentially, in mole percent, of 42-55% CdF.sub.2 and/or CdCl.sub.2, 30-40% NaF and/or NaCl, 2-20% total of BaF.sub.2 and/or BaCl.sub.2 +KF and/or KCl, consisting of 0-15% BaF.sub.2 and/or BaCl.sub.2 and 0-7% KF and/or KCl, 1-12% total of at least one stabilizing metal halide selected from the group LiX, BeX.sub.2, MgX.sub.2, MnX.sub.2, PbX.sub.2, TlX, COX.sub.2, and ZnX.sub.2, and 0,005-0.5% REX.sub.3, wherein Re is at least one rare earth metal selected from the lanthanide series of rare earth metals and X is at least one halide selected from the group consisting of fluoride, chloride, and bromide. The preferred glasses contain at least 2% each of BaF.sub.2 and/or BaCl.sub.2 and KF and/or KCl.